Basic tuning not respond

when I try to change the proportional gains in roll , pitch ,yaw it doesn’t change , for example ( its 1 and i changed to 1.3425 I write the its return again 1 ) .

I read in some website its problem in EEPROM , and the solution is to load different firmware then load again the firmware that i want to use ,but still i have same problem .

Noting that I used Mission planner 1.3.74 , firmware 3.9.10

any advice